FP6166 [FEELING]
Dual 1.5MHz, 1A Synchronous Step-Down Regulator;
| 型号： | FP6166 |
| 厂家： | 
Feeling Technology |
| 描述： | Dual 1.5MHz, 1A Synchronous Step-Down Regulator |
| 文件： | 总19页 (文件大小：473K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FP6166
Dual 1.5MHz, 1A Synchronous Step-Down Regulator
General Description
The FP6166 is a high efficiency current mode dual synchronous buck PWM DC-DC regulator.
The internal generated 0.6V precision feedback reference voltage is designed for low output voltage.
Low RDS (ON) synchronous switch dramatically reduces conduction loss. To extend battery life for
portable application, 100% duty cycle is supported for low-dropout operation. Shutdown mode also
helps saving the current consumption. The FP6166 is packaged in MSOP-10L (EP) and DFN-10L (EP)
to reduce PCB space.
Features
Input Voltage Range: 2.5 to 5.5V
Adjustable Output Voltage From 0.6V to VIN
Precision Feedback Reference Voltage: 0.6V (±2%)
Output Current: 1A (Max.) each channel
Duty Cycle: 0~100%
Internal Fixed PWM Frequency: 1.5MHz
Low Quiescent Current: 190μA
No Schottky Diode Required
Built-in Soft Start
Current Mode Operation
Over temperature Protection
Package: MSOP-10L (EP), DFN-10L (EP)
Applications
Cellular Telephone
Wireless and DSL Modems
Digital Still Cameras
Portable Products
MP3 Players
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
1/19
FP6166
Typical Application Circuit
Function Block Diagram
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
2/19
FP6166
Pin Descriptions
MSOP-10L (EP)
Name
FB1
No. I / O
Description
1
2
3
4
5
I
I
First Channel Feedback
First Channel Enable
IC Power Supply
RUN1
VIN
P
O
P
SW1
GND
First Channel Switch Output
Ground
MODE /
SYNC
Mode Selection, Oscillator
Synchronization
6
I
SW2
PG
7
8
O
O
I
Second Channel Switch Output
Power Good
RUN2
FB2
EP
9
Second Channel Enable
Second Channel Feedback
Exposed PAD – connect to Ground
10
11
I
P
DFN-10L(EP)
Name
FB1
No. I / O
Description
First Channel Feedback
First Channel Enable
IC Power Supply
1
2
3
4
5
I
I
RUN1
VIN
P
O
P
SW1
GND
First Channel Switch Output
Ground
MODE /
SYNC
Mode Selection, Oscillator
Synchronization
6
I
SW2
PG
7
8
O
O
I
Second Channel Switch Output
Power Good
RUN2
FB2
EP
9
Second Channel Enable
Second Channel Feedback
Exposed PAD – connect to Ground
10
11
I
P
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
3/19
FP6166
Marking Information
MSOP-10L(EP)
Reference Voltage Code
Ext: AD →0.6V
6166AD
Halogen Free
Lot Number
Internal ID
Per-Half Month
Year
DFN-10L(EP)
Halogen Free: Halogen free product indicator
Lot Number: Wafer lot number’s last two digits
For Example: 132386TB 86
Internal ID: Internal Identification Code
Per-Half Month: Production period indicated in half month time unit
For Example: January → A(Front Half Month), B (Last Half Month)
February → C(Front Half Month), D(Last Half Month)
Year: Production year’s last digit
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
4/19
FP6166
Ordering Information
Part Number
FP6166ADgR-G1
FP6166ADdR-G1
Operating Temperature
Package
MSOP-10L (EP)
DFN-10L (EP)
MOQ
3000EA
2500EA
Description
Tape & Reel
Tape & Reel
-40°C ~ +85°C
-40°C ~ +85°C
Absolute Maximum Ratings
Parameter
Symbol Conditions
Min.
Typ.
Max.
Unit
V
Input Supply Voltage
VIN
-0.3
-0.3
6
VIN
1
RUN, VFB, SW Voltage
V
P-Channel Switch Source Current (DC)
N-Channel Switch Source Current (DC)
Peak SW Switch Sink and Source Current (AC)
A
1
A
2
A
MSOP-10L
θJA
+70
+65
+10
+10
+85
°C / W
°C / W
°C / W
°C / W
°C
Thermal Resistance (Junction to Ambient)
Thermal Resistance (Junction to Case)
DFN-10L
MSOP-10L
θJC
DFN-10L
Operating Temperature
Junction Temperature
Storage temperature
-40
-65
+150
+150
+260
+260
°C
°C
°C
°C
MSOP-10L
DFN-10L
Lead Temperature (soldering, 10 sec)
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
5/19
FP6166
IR Re-flow Soldering Curve
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
6/19
FP6166
Recommended Operating Conditions
Parameter
Symbol
Conditions
Min.
2.5
Typ.
Max. Unit
Supply Voltage
Operating Temperature
VIN
5.5
V
-40
+85
°C
DC Electrical Characteristics (VIN=3.6V, TA= 25°C, unless otherwise noted)
Parameter
Symbol
Conditions
Min.
0.588
0.582
Typ.
Max. Unit
0.6
0.612
0.618
0.4
V
V
TA=25°C
Regulated Feedback Voltage
VFB
0.6
-40°C~+85°C
Line Regulation with VREF
Output Voltage LineRegulation
RDS (ON) of P-Channel FET
RDS (ON) of N-Channel FET
SW Leakage
VIN=2.5V to 5.5V
VIN=2.5 to 5.5V
0.04
0.04
0.28
0.25
±0.01
1.5
% / V
% / V
Ω
VFB
0.4
VOUT
RDS (ON) P ISW=100mA
RDS (ON) N ISW =-100mA
0.35
0.32
±1
Ω
ILSW
IPK
VRUN=0V, VIN=5V
VFB=0.5V
µA
A
Peak Inductor Current
Input Voltage Range
1.125
2.5
1.875
5.5
VIN
V
Shutdown, VRUN=0V
0.1
190
150
1
1
µA
µA
µA
V
Quiescent Current
ICC
Active, VFB=0.5V, VRUN=VIN
PFM, VFB=0.7V, VRUN=VIN
RUN Threshold
VRUN
IRUN
0.3
1.2
1.5
±1
RUN Leakage Current
Oscillator Frequency
±0.01
1.5
µA
MHz
FOSC
VFB=0.6V
1.8
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
7/19
FP6166
Typical Operating Characteristics (VIN=3.6V,TA= 25°C, unless otherwise noted)
Supply Current vs. VIN
Supply Current vs. VIN
80
78
76
74
72
70
68
66
64
62
60
140
138
136
134
132
130
128
126
124
122
120
VFB=0.65V
VFB=0.5V
85℃
85℃
25℃
25℃
-45℃
-45℃
2
2.5
3
3.5
4
4.5
5
5.5
6
6
6
2
2.5
3
3.5
4
4.5
5
5.5
6
VIN (V)
VIN (V)
Line Regulation
Supply Current vs. VIN
0.61
0.605
0.6
0.5
0.45
0.4
TA=25℃
Shutdown
85℃
0.35
0.3
0.25
0.2
0.595
0.59
0.15
0.1
25℃
0.05
0
-45℃
4.5
0.585
2
2.5
3
3.5
4
4.5
5
5.5
2
2.5
3
3.5
4
5
5.5
6
VIN (V)
VIN (V)
Frequency vs. VIN
Reference Voltage vs. Temperature
1.55
1.54
1.53
1.52
1.51
1.5
0.602
0.601
0.6
V
IN=3.6V
TA=25℃
0.599
0.598
0.597
0.596
0.595
1.49
1.48
1.47
1.46
1.45
2
2.5
3
3.5
4
4.5
5
5.5
-60 -50 -40 -30 -20 -10
0
10 20 30 40 50 60 70 80 90
VIN (V)
Temperature (℃)
SWITCH LEAKAGE vs. INPUT VOLTAGE
Frequency vs. Temerature
1.52
1.515
1.51
1.2
1
V
IN =3.6V
TA=25℃
1.505
1.5
0.8
0.6
0.4
0.2
0
1.495
1.49
SYNCHRONOU
1.485
1.48
MAIN SWITCH
1.475
1.47
1
2
3
4
5
6
7
-50 -40 -30 -20 -10
0
10 20 30 40 50 60 70 80 90
VIN (V)
Temperature(℃)
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
8/19
FP6166
Function Description
Control Loop
The FP6166 is a high efficiency current mode dual synchronous buck regulators. Both the main
(P-channel MOSFET) and synchronous (N-channel MOSFET) switches are built internally. With
current mode operation, the PWM duty is controlled both by the error amplifier output and the peak
inductor current. At the beginning of each cycle, the oscillator turn on the P-MOSFET switch to
source current from VIN to SW output. Then, the chip starts to compare the inductor current with the
error amplifier output. Once the inductor current is larger than the error amplifier output, the
P-MOSFET switch is turned off. When the load current increases, the feedback voltage FB will
slightly drop. This causes the error amplifier to output a higher current level until the prior mentioned
peak inductor current reach the same level. The output voltage then can be sustained at the same.
When the top P-MOSFET switch is off, the bottom synchronous N-MOSFET switch is turned on.
Once the inductor current reverses, both top and bottom MOSFET will be turn off to leave the SW pin
into high impedance state.
The FP6166’s current mode control loop also contains slope compensation to suppress
sub-harmonic oscillations at high duty cycles. This slope compensation is achieved by adding a
compensation ramp to the inductor current signal.
LDO Mode
The FP6166’s maximum duty cycle can reach 100%. That means the driver main switch is turn
on through out whole clock cycle. Once the duty reaches 100%, the feedback path no longer
controls the output voltage. The output voltage will be the input voltage minus the main switch
voltage drop.
Power Good
A common-drain pin is built into FP6166 to output the power good signal. When the output
voltage is not within ±8.5% of regulation, FP6166 will pull its POR output pin to ground. After both
channels’ outputs go within regulation, the POR output pin will be released after 175ms.
Mode Selection
User can select pulse skip mode or pulse frequency modulation operation in light loading by
connecting MODE / SYNC pin to VIN or GND. Pulse frequency modulation provides better conversion
efficiency with the penalty of a little larger output ripple, which is around double than the PWM mode’s
one.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
9/19
FP6166
Synchronous Mode
When the MODE / SYNC pin is connected to a clock, chip’s SW outputs will be synchronized to it
automatically. The synchronous range is from 0.5~1.5 time input clock frequency. In this mode,
pulse skip mode is selected automatically.
Over Current Protection
FP6166 limits the peak main switch current cycle by cycle. When over current happens, chip will
turn off the main switch and turn the synchronous switch on until next cycle.
Short Circuit Protection
When the FB pin drops below 300mV, the chip will tri-state the output pin SW automatically. After
300us rest to avoid over heating, chip will re-initiate PWM operation with soft start.
Thermal Protection
FP6166 will shutdown automatically when the internal junction temperature reaches 150°C to
protect both the part and the system.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
10/19
FP6166
Application Information
Input capacitor Selection
The input capacitor must be connected to the VIN pin and GND pin of the FP6166 to maintain
steady input voltage and filter out the pulsing input current. The voltage rating of input capacitor must
be greater than maximum input voltage plus ripple voltage.
In switch mode, the input current is discontinuous in a buck converter. The source current of the
high-side MOSFET is a square wave. To prevent large voltage transients, a low ESR input capacitor
sized for the maximum RMS current must be used. The RMS value of input capacitor current can be
calculated by:
VO
VO
IRMS IO_MAX
1
VIN
VIN
It can be seen that when VO is half of VIN, CIN is under the worst current stress. The worst current
stress on CIN is IO_MAX/2.
Inductor Selection
The value of the inductor is selected based on the desired ripple current. Large inductance gives
low inductor ripple current and small inductance result in high ripple current. However, the larger value
inductor has a larger physical size, higher series resistance, and/or lower saturation current. In
experience, the value is to allow the peak-to-peak ripple current in the inductor to be 10%~20%
maximum load current. The inductance value can be calculated by:
(VIN VO ) VO
f IL VIN
(VIN VO )
2 (10% ~ 20%)IO
VO
VIN
L
f
The inductor ripple current can be calculated by:
VO
VO
IL
1
f L
VIN
Choose an inductor that does not saturate under the worst-case load conditions, which is the
load current plus half the peak-to-peak inductor ripple current, even at the highest operating
temperature. The peak inductor current is:
IL
IL _PEAK IO
2
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
11/19
FP6166
The inductors in different shape and style are available from manufacturers. Shielded inductors
are small and radiate less EMI issue. But they cost more than unshielded inductors. The choice
depends on EMI requirement, price and size.
Dimensions (mm)
Component Supplier
Model
Inductor Value (µH)
2.2
2.2
3.3
4.7
4.7
4.7
4.2×3.7×1.2
4.4×5.8×1.2
4.2×3.7×1.2
4.2×3.7×1.2
4.4×5.8×1.2
4.9×4.9×1.0
FENG-JUI
Sumida
TP4212-2R2M
CMD4D11 2R2
TP4212-3R3M
TP4212-4R7M
CMD4D11 4R7
CLSD09 4R7
FENG-JUI
FENG-JUI
Sumida
Sumida
Output Capacitor Selection
The output capacitor is required to maintain the DC output voltage. Low ESR capacitors are
preferred to keep the output voltage ripple low. In a buck converter circuit, output ripple voltage is
determined by inductor value, switching frequency, output capacitor value and ESR. The output ripple
is determined by:
1
VO IL ESRCOUT
8 f COUT
Where f = operating frequency, COUT= output capacitance and ΔIL = ripple current in the inductor.
For a fixed output voltage, the output ripple is highest at maximum input voltage since ΔIL increases
with input voltage.
Capacitor Value
Case Size
0603
Component Supplier
Model
4.7
10
10
22
TDK
Taiyo Yuden
TDK
C1608JB0J475M
JMK212BJ106MG
C12012X5ROJ106K
C2012JB0J226M
0805
0805
0805 1206
TDK
Using Ceramic Input and Output Capacitors
Care must be taken when ceramic capacitors are used at the input and the output. When a
ceramic capacitor is used at the input and the power is supplied by a wall adapter through long wires, a
load step at the output can induce ringing at the input, VIN. At best, this ringing can couple to the output
and be mistaken as loop instability. At worst, a sudden inrush of current through the long wires can
potentially cause a voltage spike at VIN, large enough to damage the part. When choosing the input and
output ceramic capacitors, choose the X5R or X7R dielectric formulations. These dielectrics have the
best temperature and voltage characteristics of all the ceramics for a given value and size.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
12/19
FP6166
Output Voltage Programming
In the adjustable version, the output voltage is set using a resistive voltage divider from the output
voltage to FB. The output voltage is:
R
1
VO 0.6V 1
R2
The recommended resistor value is summarized below:
VOUT (V)
0.6
R1 (Ω)
200k
200k
300k
200k
270k
306k
R2 (Ω)
Not Used
200k
C3 (F)
Not Used
10p
1.2
1.5
200k
10p
1.8
100k
10p
2.5
85k
10p
3.3
68k
10p
PC Board Layout Checklist
1. The power traces, consisting of the GND trace, the SW trace and the VIN trace should be kept
short, direct and wide.
2. Place CIN near VIN Pin as closely as possible. To maintain input voltage steady and filter out
the pulsing input current.
3. The resistive divider R1and R2 must be connected to FB pin directly as closely as possible.
4. FB is a sensitive node. Please keep it away from switching node, SW. A good approach is to
route the feedback trace on another layer and to have a ground plane between the top layer
and the layer on which the feedback trace is routed. This reduces EMI radiation on to the
DC-DC converter’s own voltage feedback trace.
5. Keep the GND plates of CIN and COUT as close as possible. Then connect this to the
ground-plane (if one is used) with several vias. This reduces ground plane noise by preventing
the switching currents from circulating through the ground plane. It also reduces ground
bounce at the FP6166 by giving it a low impedance ground connection.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
13/19
FP6166
Suggested Layout
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
14/19
FP6166
Typical Application
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
15/19
FP6166
ILOAD: 100mA~1A
ILOAD: 200mA~1A
Ch1:VOUT Ch4: ISW
Ch1: VOUT Ch4: ISW
Efficiency (VOUT: 2.5V)
EN On waveform (VOUT: 2.5V)
Efficiency VS. Output Current
100
90
80
70
60
50
40
30
20
10
0
Vin=2.7V
Vin=3.6V
Vin=4.2V
0.1
1.0
10.0
100.0
1000.0
Output Current (mA)
Ch1: EN Ch2: SW Ch3: VOUT Ch4: ISW
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
16/19
FP6166
Package Outline
MSOP-10L (EP)
UNIT: mm
Max. (mm)
Symbols
Min. (mm)
A
A1
A2
b
1.100
0.150
0.950
0.270
0.230
0.000
0.750
0.170
0.080
c
D
3.000 BSC.
4.900 BSC.
3.000 BSC.
0.500 BSC.
E
E1
e
L
0.400
0°
0.800
8°
L1
θ°
0.950 REF.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
17/19
FP6166
MSOP-10L (EP) continued
Exposed PAD Dimensions:
Symbols
Min. (mm)
Max. (mm)
E2
D1
1.715 REF
1.600 REF
Note:
1. Package dimensions are in compliance with JEDEC outline: MO-187 BA-T.
2. Dimension “D” does not include molding flash, protrusions or gate burrs.
3. Dimension “E1” does not include inter-lead flash or protrusions.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
18/19
FP6166
DFN-10L
UNIT: mm
Symbols
Min. (mm)
0.700
Max. (mm)
0.800
A
A1
A3
b
0.000
0.050
0.20REF
0.180
0.300
D
3.00
3.00
E
D2
E2
e
2.200
1.400
2.700
1.750
0.500
L
0.300
0.200
0.500
K
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.65
19/19
相关型号：
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